Fabrication of the diamond sawblade bits with Fe-Co metallic matrix by microwave strengthened sintering

doi:10.16085/j.issn.1000-6613.2017-1263

Chemical Industry and Engineering Progress ›› 2018, Vol. 37 ›› Issue (04): 1529-1535.DOI: 10.16085/j.issn.1000-6613.2017-1263

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Fabrication of the diamond sawblade bits with Fe-Co metallic matrix by microwave strengthened sintering

GAO Jiyun^1,2,3,4, LIU Chenhui^2,4, WANG Fang^1,4, YANG Li⁵, JIA Lijuan⁴, DUAN Kaijiao⁴, LIU Tiancheng^1,2,3,4, GUO Yu⁴

1 Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan, Kunming 650500, Yunnan, China;
2 Key Laboratory of Resource Clean Conversion in Ethnic Region, Education Department of Yunnan, Kunming 650500, Yunnan, China;
3 Key Laboratory of Comprehensive Utilization of Mineral Resources in Ethnic Regions, Kunming 650500, Yunnan, China;
4 College of Chemistry and Environment, Yunnan MinZu University, Kunming 650500, Yunnan, China;
5 Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

Received:2017-06-23 Revised:2017-07-30 Online:2018-04-05 Published:2018-04-05

微波强化烧结制备铁钴基金刚石锯片刀头

高冀芸^1,2,3,4, 刘晨辉^2,4, 王访^1,4, 杨黎⁵, 贾丽娟⁴, 段开娇⁴, 刘天成^1,2,3,4, 郭雨⁴

1 云南省跨境民族地区生物质资源清洁利用国际联合研究中心, 云南昆明 650500;
2 云南省高校民族地区资源清洁转化重点实验室, 云南昆明 650500;
3 民族地区矿产资源综合利用重点实验室, 云南昆明 650500;
4 云南民族大学化学与环境学院, 云南昆明 650500;
5 昆明理工大学冶金与能源工程学院, 云南昆明 650093

通讯作者: 刘天成,教授,研究方向为化工过程、材料烧结。
作者简介:高冀芸(1989-),女,硕士,助教。
基金资助:
国家自然科学基金（51604134，51568068）、云南民族大学校内青年基金科研项目（2017QN06）、云南省应用基础研究计划青年项目（201701YE00021）、国家国际科技合作项目（2015DFR50620）、云南省教育厅科学研究基金（2016ZZX040）及云南民族大学大学生创新创业训练计划（2017JWC-DC-39）项目。

Abstract

Abstract: The iron-cobalt(Fe-Co) metallic matrix diamond sawblade bits with low cobalt were successfully fabricated through microwave sintering. The microwave-absorbing characteristic of the designed recipe compacts were estimated on an electromagnetic characteristic test system by applying the cylindrical resonant cavity perturbation method. The microwave sintering procedure was designed according to the heating characteristics of the material in the microwave field. The microstructure information and mechanical properties were investigated and compared by using scanning electron microscope(SEM),relative density and hardness tests in case of the microwave and conventional sintering method. The result showed the relative density and hardness reached 96.63% and 99.4HRB respectively for the low cobalt samples sintered at 850℃. In addition,the microstructure was still uniform when the samples was under microwave sintered at the temperature rate of 32.5℃/min. Compared with the conventional sintering method,on the premise of comparative mechanical properties,microwave strengthening sintering can significantly shorten the total sintering time and decrease the sintering temperature below 900℃ to achieve similar mechanical properties of the product. The microwave heating technology shows an excellent application prospect in the field of the strengthen sintering for the metallic matrix diamond tool bits.

Key words: powders, sintering, heat conduction, mechanical properties

摘要： 采用微波烧结技术制备了低钴型Fe-Co基金刚石锯片刀头，利用圆柱谐振腔微扰法电磁特性测试系统评价了配方物料压坯的吸波特性，并结合物料在微波场中的升温特性设计了可行的微波烧结制度。采用SEM、致密度和硬度测试对比研究了微波烧结和常规烧结所得样品的微结构信息和力学性能。结果表明，对于低钴高铁型配方，在850℃下微波烧结获得的样品，其相对致密度和硬度即可分别达到96.63%和99.4HRB，微波烧结在最大升温速率为32.5℃/min时能保证烧结体组织均匀。与常规烧结方法相比，在获得同等级力学性能的前提下，微波强化烧结可将温度降低至900℃以下，显著缩短了烧结总时间，在金属基金刚石工具刀头烧结方面表现出良好的应用前景。

关键词: 粉体, 烧结, 热传导, 力学性能

CLC Number:

GAO Jiyun, LIU Chenhui, WANG Fang, YANG Li, JIA Lijuan, DUAN Kaijiao, LIU Tiancheng, GUO Yu. Fabrication of the diamond sawblade bits with Fe-Co metallic matrix by microwave strengthened sintering[J]. Chemical Industry and Engineering Progress, 2018, 37(04): 1529-1535.

高冀芸, 刘晨辉, 王访, 杨黎, 贾丽娟, 段开娇, 刘天成, 郭雨. 微波强化烧结制备铁钴基金刚石锯片刀头[J]. 化工进展, 2018, 37(04): 1529-1535.

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Fabrication of the diamond sawblade bits with Fe-Co metallic matrix by microwave strengthened sintering

微波强化烧结制备铁钴基金刚石锯片刀头

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